Patents by Inventor David P. Danson

David P. Danson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5526204
    Abstract: A read/write head for an information recording apparatus having a liquid bearing lubricant between a rotating storage medium and the read/write head is disclosed. The head is provided an actuator to position the read/write head over the rotating storage medium. The head includes a slider body having at least a first and second regions; and an interface element comprising a transducer interacting with the storage medium and mounted on the first region of the slider body. A relative motion exists between the head and the rotating storage medium and the slider body is supported by the liquid bearing lubricant during such motion, such that the first region of the slider body is supported at a first distance above the storage medium, and the second region of the slider body is supported at a second distance above the storage medium, whereby the first region of the slider body has a substantially higher drag than the second region when the head moves relative to the storage medium.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: June 11, 1996
    Assignee: Conner Peripherals, Inc.
    Inventors: William French, James U. Lemke, Turguy Goker, Walter Wong, William Repphun, David P. Danson
  • Patent number: 5473431
    Abstract: A device for accurately measuring flying heights of a read/write head in a disk drive down to zero microinches using interferometry, wherein the flying height of the head above the disk surface is calculated by directing white light to the under side of a rotating disk. An interference pattern is obtained by reflecting a first portion of the light off of the top surface of the disk and reflecting a second portion of the light off of the underside of the read/write head, and then recombining the first and second portions of light. The interference pattern is then input to a spectrophotometer, which creates an intensity profile from which the flying height of the read/write head above the disk may be calculated. A spacer layer is provided on the upper surface of the disk to increase the phase difference of the first and second portions of light, thereby allowing clear interpretation of the interference pattern at extremely low flying heights.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: December 5, 1995
    Assignee: Conner Peripherals, Inc.
    Inventors: Dennis R. Hollars, David P. Danson
  • Patent number: 4886421
    Abstract: A vertical axis wind turbine blade comprising a blade body with a leading edge and trailing edge there between being generally parallel to each other with a series of a given intersecting triangulation of troughs along the enire blade length with each trough so intersecting transversally the trailing edge and being a upwardly given taper in direction of the leading edge by approximately 80 percent of the blade width and therewithal each trough is formed into a wind channelling containment of equispaced troughs there upon being adjacent with each other along the blade length and with the trough width therein respectively changing the wind driven air columns for a maximum transferring of energy to the blades on the windward side by a higher pressure building up while going into the troughs, while there about on the opposite side there is a reversal type of effect being cause by a pressure drop across the troughs by a lowering of air pressure flows into the troughs to therein cause an effect of speeding up the v
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: December 12, 1989
    Assignee: Wind Feather, United Science Asc.
    Inventor: David P. Danson
  • Patent number: 4764090
    Abstract: A cross wind axis type wind turbine includes four wind driven airfoil blades pivotally connected between upper and lower sets of support spokes supported on a rotating vertical column so that the blades are upwardly inclined towards the column axis to produce an accelerated downwardly swirling air flow in the turbine interior. The lower spokes are airfoil shaped to draw wind into the turbine to further accelerate the air flow in the turbine for improved blade efficiency. A feedback control arrangement responsive to changes in wind speed or direction adjusts the blade angles to the wind for optimum efficiency by virtue of a rack and pinion assembly connecting each blade to a center plate through connecting rods extending radially through each upper spoke.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: August 16, 1988
    Assignee: Wind Feather, United Science ASC
    Inventor: David P. Danson